<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <!-- 下面的DIV，需要配合CSS，才能完成布局 -->
    <div class="wraper">
        <div class="header">Header</div>
        <div class="main">
            <div class="article">
                <div class="article_item">文章1</div>
                <div class="article_item">文章2</div>
                <div class="article_item">文章3</div>
            </div>
            <div class="aside">Aside</div>
        </div>
        <div class="footer">Footer</div>
    </div>
</body>
</html>